RHSA-2011:1344 - Security Advisory

Topic

Updated seamonkey packages that fix two security issues are now available
for Red Hat Enterprise Linux 4.

The Red Hat Security Response Team has rated this update as having critical
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

Description

SeaMonkey is an open source web browser, email and newsgroup client, IRC
chat client, and HTML editor.

A flaw was found in the way SeaMonkey handled frame objects with certain
names. An attacker could use this flaw to cause a plug-in to grant its
content access to another site or the local file system, violating the
same-origin policy. (CVE-2011-2999)

An integer underflow flaw was found in the way SeaMonkey handled large
JavaScript regular expressions. A web page containing malicious JavaScript
could cause SeaMonkey to access already freed memory, causing SeaMonkey to
crash or, potentially, execute arbitrary code with the privileges of the
user running SeaMonkey. (CVE-2011-2998)

All SeaMonkey users should upgrade to these updated packages, which correct
these issues. After installing the update, SeaMonkey must be restarted for
the changes to take effect.

Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 4 x86_64
• Red Hat Enterprise Linux Server 4 ia64
• Red Hat Enterprise Linux Server 4 i386
• Red Hat Enterprise Linux Workstation 4 x86_64
• Red Hat Enterprise Linux Workstation 4 ia64
• Red Hat Enterprise Linux Workstation 4 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux for IBM z Systems 4 s390x
• Red Hat Enterprise Linux for IBM z Systems 4 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc

Fixes

• BZ - 741904 - CVE-2011-2999 Mozilla: XSS via plugins and shadowed window.location object (MFSA 2011-38)
• BZ - 741924 - CVE-2011-2998 Mozilla: Integer underflow when using JavaScript RegExp (MFSA 2011-37)

CVEs

• CVE-2011-2999
• CVE-2011-2998

References

• https://access.redhat.com/security/updates/classification/#critical